Source Input Format

A video format that was developed to allow the storage and transmission of digital video.

Source Input Format, defined in MPEG-1, is a video format that was developed to allow the storage and transmission of digital video.

  • 625/50 SIF format (PAL/SECAM) has a resolution of (360 or) 352 x 288 active pixels and a refresh rate of 25 frames per second.
  • 525/59.94 SIF Format (NTSC) has a resolution of (360 or) 352 x 240 active pixels and a refresh rate of 29.97 frames per second.

When compared to the CCIR 601 specifications, which defines the appropriate parameters for digital encoding of TV signals, SIF can be seen as being reduced by half in all of the height, width, frame-rate, and chrominance. SIF video is known as a constrained parameter bitstream.

The computer industry has defined square-pixel SIF to be 320 x 240 (QVGA) or 384 x 288 active pixels with a refresh rate of whatever the computer is capable of supporting.

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Source Input Format
acronymn
  • SIF
source
Adapted from content published on wikipedia.org
credit
  • Image By Tvaughan1 - Originally from en.wikipedia; description page is/was here. Original uploader was Tvaughan1 at en.wikipedia, Public Domain — from wikimedia.org
Last modified on August 19, 2020, 6:06 pm
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